Science
easyQ. No. 15066-what-is-the-approximate-mass-of-an-electron
What is the approximate mass of an electron?
Last Updated:
A9.1 × 10⁻²⁸ kg
B1.67 × 10⁻²⁷ kg
C1.67 × 10⁻³¹ kg
D9.1 × 10⁻³¹ kg
Correct Answer: 9.1 × 10⁻³¹ kgYour Answer: D
Explanation
The electron is the lightest of the three fundamental subatomic particles (electron, proton, neutron). Its mass is approximately 9.1 × 10⁻³¹ kg (more precisely 9.10938 × 10⁻³¹ kg). Option A (9.1 × 10⁻²⁸ kg): This is not the correct value for electron mass. It is 1000 times larger than the actual electron mass. Option B (1.67 × 10⁻²⁷ kg): This is the mass of a PROTON, not an electron. The proton is about 1836 times heavier than the electron. While the exponent (-31) is correct, the coefficient 1.67 belongs to the proton/neutron mass.
Related Questions
View All15107-what-is-the-significance-of-india-s-three-stage-nuclear-power-programWhat is the significance of India's three-stage nuclear power pro...15106-during-nuclear-fission-of-u-235-how-many-neutrons-are-approximately-released-per-fission-eventDuring nuclear fission of U-235 how many neutrons are approximate...15105-which-country-conducted-the-first-nuclear-test-and-what-was-it-calledWhich country conducted the first nuclear test and what was it ca...